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https://issues.apache.org/jira/browse/SPARK-23576?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16395803#comment-16395803
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Henry Robinson commented on SPARK-23576:
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Do you have a smaller repro, or does it only reproduce if you create all three
tables?
> SparkSQL - Decimal data missing decimal point
> ---------------------------------------------
>
> Key: SPARK-23576
> URL: https://issues.apache.org/jira/browse/SPARK-23576
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.3.0
> Environment: spark 2.3.0
> linux
> Reporter: R
> Priority: Major
>
> Integers like 3 stored as a decimal display in sparksql as 30000000000 with
> no decimal point. But hive displays fine as 3.
> Repro steps:
> # Create a .csv with the value 3
> # Use spark to read the csv, cast it as decimal(31,8) and output to an ORC
> file
> # Use spark to read the ORC, infer the schema (it will infer 38,18
> precision) and output to a Parquet file
> # Create external hive table to read the parquet ( define the hive type as
> decimal(31,8))
> # Use spark-sql to select from the external hive table.
> # Notice how sparksql shows 30000000000 !!!
>
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